package com.shali.concurrency.atomic;

import com.shali.concurrency.annoations.ThreadSafe;

import java.util.concurrent.CountDownLatch;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Semaphore;
import java.util.concurrent.atomic.AtomicLong;

@ThreadSafe
public class AtomicExample2 {

    //请求总数
    public static int clientTotal = 5000;
    //同时并发执行的线程数
    public static int threadTotal = 50;

    public static AtomicLong count = new AtomicLong();


    public static void main(String[] args) throws Exception{
        ExecutorService executorService = Executors.newCachedThreadPool();
        final Semaphore semaphore = new Semaphore(threadTotal);
        final CountDownLatch countDownLatch = new CountDownLatch(clientTotal);

        for(int i = 0; i<clientTotal; i++){

            executorService.execute(() -> {
                try{
                    semaphore.acquire();
                    add();
                    semaphore.release();
                }catch (Exception e){
                    e.printStackTrace();
                }
                countDownLatch.countDown();
            });
        }
        countDownLatch.await();
        System.out.println("count:"+count.get());
    }

    private static void add(){
        count.getAndIncrement();
//        count.incrementAndGet();
    }
}
